Most of the aerial apparatus manufacturers require that we place outrigger pads beneath the feet of the outriggers. You have to really be able to know exactly where your outrigger foot is going to come down and leave the pad in that exact spot, or go back and make a quick adjustment when you realize that you are not lining up.
While in Los Angeles a few years ago doing ladder training, we noticed that they pre-welded small guides that can easily slide onto the outrigger feet before they ever come out from the apparatus. That way you are always spot on.
I thought it was a pretty slick idea. If you can't tell from the pictures, L.A. City uses LTI aerials (American LaFrance).
Any thoughts to it?